Question

The concentration of phenylephrine hydrochloride in a prefilled syringe is 10 mg/mL. What is the percentage concentration (w/v) of phenylephrine in the injection. (Answer must be numeric; no units or commas; round the final answer to the nearest WHOLE number.)

Answer 1

Answer:

The percentage concentration (w/v) of phenylephrine in the injection is 1 %.

Explanation:

The percentage concentration in w/v of the phenylephrine hydrochloride can be calculated as follows:

$\%^{w}/_{v} = \frac{m}{V} \times 100$

Where:

m: is the mass of the solute in grams

V: is the volume of the solution in milliliters

The concentration of the phenylephrine hydrochloride is 10 mg/mL, so the percentage concentration is:

$\%^{w}/_{v} = \frac{m}{V} \times 100$

$\%^{w}/_{v} = \frac{10 \cdot 10^{-3} g}{1 mL} \times 100$

$\%^{w}/_{v} = 1 \%$

Therefore, the percentage concentration (w/v) of phenylephrine in the injection is 1 %.

I hope it helps you!